Violet vat dyestuffs



Patented Mar; 22', 1932i nine} STATES? Hansen: linens'ffiinnishnfimrfiiiniawnnncn Fox, onwrnmmgromnnnnwnnn, ASSIGNORSTO E; I. no PONT'DE NEMOURS &' cofirnmr; or 'wrmme ron DELLA:

WARE, A CORPORATION OF DELAWARE VIOLET vA'r nvns'rurr x No Drawing.

7 This invention relates-tonew vat;d'j*es;and

l more particularly the dyes resulting from the condensation For certain .thionaphthenes With certain isatiirhalidesfi- Hofla and Heyna (us.- yliatent 1,7 62,817, June 10, 1930) have1disclosed1(Ex. IV) a compound of the probable formula which is avviolet vat djelof reddish shade.

It has now been. foundthat shifting the tion in the thionaphthene nucleus produces an unusual and uneiip'ected 'hlueing of the shade Without adversely affectingthe other properties i of the dye; I The above position numbers Yarebased'on the customary number;

' ing'scheme which is as afollows: 1

with a halo-isatin halide:

The invention will be readily; understood from consideration of the following exam-- ple in which theparts are giventhy Weight.

En ample c In about 122 partsi ofcchloro-benzene were pu eeu;l 1 -p rtss 'zaigbrano-i nm Application filed December'10;-1930; serial ifidzi501365;; j,

parts of phosphorus pentachlorid the ifiiiztuf heated uii dei refluxing :oiiditions until solutionwas complete. To the resulting isatin chloride *1 solutioii there a dry solution 1 of a 3hydroxy 5-methyl-thionaph theme in abh1it 66 parts of chlorol-benzene. The dye formedfit"oiice and when the reaction wasgeoriiplete it ivasfiltered'ofi and Washedwvith alcijhol. It is a reddish violet powder which reducesfin; an; alkaline hydrofsulphite vat to a yellowish solution. lt dy es cotton .vvith desirableq shades of bluish violet having good fastness. I

The proces and productiarenotliniitedoto the 5 7 -di-bron1o-i'satin of the above-example. Other. isa'tin compounds m y be used, for instance the process of Eiiarnple '1 may be carried out using 5.3 partsof isatin-chloride sirable results arealso obtained with proportionate quantities of 5';7,-di-chloro-isatin a,

g Halogen Halogen-04A may be employed in the reactions above set out, preferably those compoundsriiresented by the formula or V in R and hydrogen or a:

- halogen atom-;, particularly @bromine or chlorine are usedi' In a similar manntbthe alkyl groups c such as ethyl replace the methyl of the 3- 1 T hydroxy-5-methyl-thionaphthene;

As many apparently widely different embodiments of this invention may made without departing from the spirit and scope thereof, it is to be understood that we do not limit ourselves to the specific embodiments thereof except as defined in the appended claims.

We claim:

1. The vat dyestuffs having the formula in which R and R represent hydrogen or a halogen atom.

2. The vat dyestuffs having the formula in which R and R represent a hydrogen, bromine or chlorine atom. v 3. The vat dyestulfshaving the formula I Al yl in which R and R represent a bromine or chlorine atom. 4. The vat dyestuffs having the formula I Y 0 Halogen Alky i l J 1 l 0 0 r i 8/ \N p l Halogen p 5. The vat dyestuifshaving the formula in which R and IR represent a hydrogen, bromine or chlorine atom.

6. The vat dyestuffs having the formula in which R and R represent a bromine or chlorine atom. I 7. The vat dye'stufl's having the formula Alky Halogen \C=C/ I 3/ \N HaloEen 8. The vat dyestuffs having the formula '10. The vat dyestufl having the formula 0 g 0 "0H li ti s I N which dyestufi is a reddish violet powder which reduces in alkaline hydrosulphite to a yellowish solution.

11. The process of producing vat dyes which comprises condensing an isatin-hallde of the probable formula Ramsey-OM13 I i y R: I

in which R and R represent hydrogen or a halogen atom with 3-hydr0xy-5-alkyl-thionaphthene.

12. The process of producing vat dyes which com rises condensing an isatin-hallde of the pro able formula in which R and R represent a hydrogen, bromine or chlorine atom with 3-hydroxy- 5-alkyl-thionaphthene.

13. The process of producing vat dyes which comprises condensing an isatin-halide of the probable formula in which R and R represent hydrogen or a halogen atom with 3 hydroxy-5-alkyl-thionaphthene.

14. The process of-producing vat dyes which comprises condensing 3-hydroxy-5- alkyl-thionaphthene with a di-halo-isatinhalide.

, 15. The p rocess of producing vat Y dyes which comprises condensing 3-hydroxy-5- alkyl-thionaphthene withfa di-bromo-isa-t inchloride.

In tes tim tures.

ony whereof :We aflixv out signa- HERBERT A..LUBS;

ARTHUR 1, Fox; 

